Estimated reading time: 2 minutes
Create machines using an existing VM/Host with SSH.
This is useful if you are using a provider that Machine does not support directly or if you would like to import an existing host to allow Docker Machine to manage.
The driver performs a list of tasks on create:
- If docker is not running on the host, it is installed automatically.
- It updates the host packages (
- It generates certificates to secure the docker daemon.
- If the host uses systemd, it creates /etc/systemd/system/docker.service.d/10-machine.conf
- The docker daemon restarts, thus all running containers are stopped.
- The hostname is updated to fit the machine name.
To create a machine instance, specify
--driver generic, the IP address or DNS
name of the host and the path to the SSH private key authorized to connect
to the host.
$ docker-machine create \ --driver generic \ --generic-ip-address=203.0.113.81 \ --generic-ssh-key ~/.ssh/id_rsa \ vm
The user that is used to SSH into the host can be specified with
--generic-ssh-user flag. This user needs password-less sudo
If it’s not the case, you need to edit the
sudoers file and configure the user
as a sudoer with
NOPASSWD. See https://help.ubuntu.com/community/Sudoers.
--generic-engine-port: Port to use for Docker Daemon (Note: This flag does not work with boot2docker).
--generic-ip-address: required IP Address of host.
--generic-ssh-key: Path to the SSH user private key.
--generic-ssh-user: SSH username used to connect.
--generic-ssh-port: Port to use for SSH.
Note: You must use a base operating system supported by Machine.
Environment variables and default values
|CLI option||Environment variable||Default|
For systems that use systemd, if you have an existing configuration defined in ‘/etc/systemd/system/docker.service.d/’ this may conflict with the settings created by docker-machine. Make sure you don’t have any other configuration files in this location that override the [ExecStart] setting.
Once you have confirmed any conflicting settings have been removed, run
sudo systemctl daemon-reload followed by
sudo systemctl restart docker